I think that it's fine to monetize any meeting, Bitcoin included. If you are wealthy, and you're doing it like volunteering, surely you would not collect money. But if you are a person who wants to do something good but also kind of needs money, it's fine. In that case, you have various options:
1. Set a fixed entrance fee.
2. Set a 'pay what you wish' fee.
3. Find a sponsor of the event, so that you get paid but participants don't need to pay.
I am not wealthy 😕. I'm just a youth who is struggling. Hence, it should at least earn me some cents (lol).
3. Find a sponsor of the event, so that you get paid but participants don't need to pay.
This isn't any easy. I wish there was a sponsor (so those attending don't have to pay).
I even intend to hold another meeting but if I can't find a way afford it, I'll have to back off.